On Fri, Oct 18, 2013 at 11:25 PM, Monty Montgomery <xiphmont@xxxxxxxxx> wrote: > On Fri, Oct 18, 2013 at 5:36 PM, James Stone <jamesmstone@xxxxxxxxx> wrote: > >> I am wanting to get some audio and video recorded - sample accurately >> - so there is minimal delay between audio and video, and no drift. > > Any camera will give you this if you use the audio input on the > camera. Or do you mean you need to record to some other device and > sync later? If the latter, you're in for a world of pain. The clocks > will drift unless you're using a shared clock, and that's a whole > different class of professional equipment.... > OK - that's encouraging at least! >> Can >> any format do this? > > All of them. The trouble people usually have is software that handles > the sync incorrectly (or doesn't really try to handle it at all. If > it's based on ffmpeg.... yeah 'all bets are off'). > >> Do you have recommendations about how to record a >> file which will play back with perfect audio and video sync on all >> players (file size is not an issue)? > > Just about any camera made. > >> Secondly, I am wanting to intentionally shift the audio timing so it >> may be 5ms/10ms/50ms/100ms or more out of time with the video. Do you >> have any suggestions on software which will do this? > > Any NLE will do this. I use Cinelerra, but I'd urge you not to :-) > >> Lastly, do any of you know any research about the limits of human >> perception with these kinds of things? > > You'll not hit the limits of human perception in video-- even 10 bit > isn't quite there, and you ca always get closer to see more > resolution. I meant in terms of timing shift of audio vs video? James _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
